Determination of glass transitions in novel cellulose polymers by synchrotron wide-angle X-ray scattering

Tristram, CJ; Ingham, B; Williams, DBG; Hinkley, SFR

Determination of glass transitions in novel cellulose polymers by synchrotron wide-angle X-ray scattering

Tristram, CJ Ingham, B Williams, DBG

Hinkley, SFR

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Publication Type:: Journal Article
Citation:: Materials Today Communications, 2015, 2 pp. e49 - e54
Issue Date:: 2015-03-01

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Field	Value	Language
dc.contributor.author	Tristram, CJ	en_US
dc.contributor.author	Ingham, B	en_US
dc.contributor.author	Williams, DBG https://orcid.org/0000-0002-3703-6301	en_US
dc.contributor.author	Hinkley, SFR	en_US
dc.date.issued	2015-03-01	en_US
dc.identifier.citation	Materials Today Communications, 2015, 2 pp. e49 - e54	en_US
dc.identifier.uri	http://hdl.handle.net/10453/117237
dc.description.abstract	© 2014 Elsevier Ltd. Synchrotron wide angle X-ray scattering (WAXS) was used to measure the glass-transition temperature (Tg) values for various cellulosic materials including a novel cellulose ester. WAXS patterns were obtained of films cast on silicon nitride windows. Two strong scattering peaks were observed that correlated with the intramolecular repeating anhydroglucose unit (d=10.6-14.3Å) and an intermolecular packing spacing (d=4.4-4.5Å). Real-time measurements were made during temperature cycling over a range of 80-160°C at 5°C/min. Significant shifts in position, width and area for the peak assigned to the intermolecular arrangement of the pseudo-linear cellulose mixed-ester chains were correlated with temperature. The calculated Tg mid-points correlated well with Tg values determined by differential scanning calorimetry (DSC). This application of temperature-dependent WAXS measurements shows promise for Tg determination in samples where shallow second-order transitions are observed by DSC and where other techniques are not applicable.	en_US
dc.relation.ispartof	Materials Today Communications	en_US
dc.relation.isbasedon	10.1016/j.mtcomm.2014.12.004	en_US
dc.title	Determination of glass transitions in novel cellulose polymers by synchrotron wide-angle X-ray scattering	en_US
dc.type	Journal Article
utslib.citation.volume	2	en_US
utslib.for	0303 Macromolecular and Materials Chemistry	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	2	en_US

Abstract:

© 2014 Elsevier Ltd. Synchrotron wide angle X-ray scattering (WAXS) was used to measure the glass-transition temperature (Tg) values for various cellulosic materials including a novel cellulose ester. WAXS patterns were obtained of films cast on silicon nitride windows. Two strong scattering peaks were observed that correlated with the intramolecular repeating anhydroglucose unit (d=10.6-14.3Å) and an intermolecular packing spacing (d=4.4-4.5Å). Real-time measurements were made during temperature cycling over a range of 80-160°C at 5°C/min. Significant shifts in position, width and area for the peak assigned to the intermolecular arrangement of the pseudo-linear cellulose mixed-ester chains were correlated with temperature. The calculated Tg mid-points correlated well with Tg values determined by differential scanning calorimetry (DSC). This application of temperature-dependent WAXS measurements shows promise for Tg determination in samples where shallow second-order transitions are observed by DSC and where other techniques are not applicable.

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http://hdl.handle.net/10453/117237